66 



Gen 15. Orchomenella, G. O. Sars, n. 

 Syu : Orchomene, Boeck (ex parte). 



Body mrire or les.s plumpy, witli large coxal plates. Last pair of 

 epimeral plates of inetasome scai'cely serrated posteriori)', infero-lateral corners 

 blunt or slightly produced. Superior antennse about as in Orchomene; inferior 

 ones, as a rule, more slender and elongated than the siiperior, in male scarcely 

 as long as the l>ody. Epistome les.s piojecting than in that genus, and evenly 

 rounded or flattened in front. Mandibles of somewhat coarser structure than 

 in Orchomene, molar expansion comparatively larger and blunted at the tij), 

 palp slender and not originating so near the base as in the latter genus. 

 First pair of maxillae witli the masticatory lobe very obliquely trimcated at 

 the tip, spines partly lamellar and finely denticulated at one of their edges, 

 basal lobe and palp about as in OrcJiomcme. Second pair of maxilla? witli tlie 

 lobes less elongated. Maxillipeds with the masticatory lobe comparatively smaller 

 ami oblong in form, but the palp, on the other hand, larger. Anterior gnatho- 

 poda rather strong, subcheliform, posterior ones less slender than in Orchomene ; 

 propcidos short, dilated distally and densely hirsute, apex slightly produced 

 beneath the minute dactylus. Pereiopoda comparatively short, basal joint of 

 the 3 posterior pairs large and laminar. Last pair of uropoda in female 

 about as in OrcJiomene, in male but 'slightly modified, outer ramus only 

 setiferous. Telson- larger than in that genus, reaching beyond the basal part 

 of the last pair (_)f uropoda, form oljlong triangular, cleft very narrow lissure-like. 



BemarJcs. — I have seen lit to establish this new genus, in order to 

 include some small species formerly referred partly to the genus Orchomene, 

 partly to that of Anonyx and Tryphosa, but agreeng })retty well with each 

 other in certain structural details, so as to form a natural group, which 

 undoul)tedly has its nearest ally in the genus Orchomene. Besides tlie 4 

 species described below, the form recorded by the Hev. Mr. Stebbing from the 

 Challenger Expedition as Tryphosa harhatipes may perhaps more properly be 

 referred to the present genus. 



23. Orchomenella minuta, (Ki-oyer). 



(PI. 24, tig. 1). 

 Anotiyx minutus, Ki-6yer, Nat. Tidsskr. 2 K. BJ. 2, p. 23. 



Body short and tliick, with broadly vaiilted liack. Lateral corners of 

 cephahin slightly produced, in female almost right-angled, in male rather 

 narrow and acute at the tip. Coxal plates very large, the 4 anterior pairs 

 more than twice as deep as the body, 1st pair scarcely expanding below, 5th 



